Herbicides high potency

Impacts of Low-Dose, High-Potency Herbicides on Nontarget and Unintended... 

Imidazolinones are generally formulated as the amine salts. Perhaps because of their high potency, broad spectrum, and high water solubility, the imidazolinones have been co-formulated with many other herbicides. 

The first PC compound was prepared using the 2-methanesulfonylpyrimidine (OMSP) 6 and the salicylic acid ester in DMF. The sulfonyl compound 6 was a very efficient intermediate to synthesize 2-substituted pyrimidines [8]. The meth-anesulfonyl group in 6 is easily replaced by nucleophilic reagents like 7 and 8 (Fig. 2.5.5) [7, 9, 10]. This method was generally employed to synthesize numerous analogues aiming at new herbicides, not only with a high potency but also with an enhanced crop safety. Structural modifications were first made with the skeletal structure 9 (Fig. 2.5.6) [3]. 

Susan A. F. Inq)acts of low-dose, high-potency herbicides on nontarget and unintended plant species. SETAC PRESS. Pensacola, FL. (2001)... 

---